EP2907881B2 - Ligne moulée à chaud et procédé de fabrication de produits de tôle moulés à chaud - Google Patents

Ligne moulée à chaud et procédé de fabrication de produits de tôle moulés à chaud Download PDF

Info

Publication number
EP2907881B2
EP2907881B2 EP15154074.7A EP15154074A EP2907881B2 EP 2907881 B2 EP2907881 B2 EP 2907881B2 EP 15154074 A EP15154074 A EP 15154074A EP 2907881 B2 EP2907881 B2 EP 2907881B2
Authority
EP
European Patent Office
Prior art keywords
heating
station
plate
line according
forming line
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP15154074.7A
Other languages
German (de)
English (en)
Other versions
EP2907881A3 (fr
EP2907881B1 (fr
EP2907881A2 (fr
Inventor
Dipl.-Ing. Frost (FH) Georg
Dipl.-Ing. Max Niesse
Dr. Jan Lackmann
Stefan Konrad
Dr. Hans-Gerd Lambers
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Benteler Automobiltechnik GmbH
Original Assignee
Benteler Automobiltechnik GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=52462183&utm_source=***_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP2907881(B2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Benteler Automobiltechnik GmbH filed Critical Benteler Automobiltechnik GmbH
Publication of EP2907881A2 publication Critical patent/EP2907881A2/fr
Publication of EP2907881A3 publication Critical patent/EP2907881A3/fr
Publication of EP2907881B1 publication Critical patent/EP2907881B1/fr
Application granted granted Critical
Publication of EP2907881B2 publication Critical patent/EP2907881B2/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D37/00—Tools as parts of machines covered by this subclass
    • B21D37/16—Heating or cooling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/02—Stamping using rigid devices or tools
    • B21D22/022—Stamping using rigid devices or tools by heating the blank or stamping associated with heat treatment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/20—Deep-drawing
    • B21D22/208—Deep-drawing by heating the blank or deep-drawing associated with heat treatment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D43/00—Feeding, positioning or storing devices combined with, or arranged in, or specially adapted for use in connection with, apparatus for working or processing sheet metal, metal tubes or metal profiles; Associations therewith of cutting devices
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/06—Surface hardening
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/34—Methods of heating
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/0068—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for particular articles not mentioned below
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/46—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/20—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater
    • H05B3/22—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater non-flexible
    • H05B3/24—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater non-flexible heating conductor being self-supporting
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/62—Quenching devices
    • C21D1/673—Quenching devices for die quenching
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D2221/00—Treating localised areas of an article

Definitions

  • the invention relates to a hot-forming line with a heating station and a forming station for the production of hot-formed and press-hardened sheet metal products from metal blanks and a method for the production of hot-formed sheet metal products.
  • Press hardening is a process for the production of high-strength, complex vehicle components with great manufacturing accuracy. It combines deep drawing with heat treatment with the aim of increasing strength in one process. This manufacturing process requires a relatively high level of effort, since, in addition to shaping, it includes heating and subsequent defined cooling of the formed sheet metal products. The individual sub-processes have a significant influence on the component properties.
  • DE 24 52 486 A1 includes a process for the production of hardened sheet metal profiles from a metal blank in a press hardening process to the state of the art.
  • a blank made of a hardenable steel is heated to a hardening temperature above the austenitizing temperature Ac3 and then hot-formed in a press tool and then hardened while the sheet metal profile remains clamped in the press tool. Since the sheet metal profile is clamped in the press tool during the cooling process carried out in the course of the hardening process, a product with high and good dimensional accuracy is obtained.
  • the heating of the metal blanks in series production currently takes place for the most part in through-type ovens, in particular roller hearth ovens, by convection and thermal radiation. Chamber furnaces are also used.
  • Oven heating is an established heating process that enables homogeneous heating regardless of the geometry.
  • the furnace systems are usually heated electrically or with gas.
  • the temperatures required for hot forming are between 780 ° C and approx. 1,000 ° C for sheet steel.
  • the dwell time in the furnace system must be designed accordingly. This is complex in terms of system technology and requires a relatively large amount of space.
  • Induction heating is much faster. It can be applied over a wide area as well as locally. However, the homogeneity depends on the inductor geometry and is significantly more inhomogeneous than with furnace heating.
  • the efficiency of inductive heating is mainly based on the distance between the inductor and the component. The larger it is, the lower the efficiency. However, if the distance is small, the energy loss due to the heat transfer to the inductor is significantly higher.
  • a hot forming line with an inductively heated heating device counts through the DE 10 2012 110 650 B3 to the state of the art.
  • the hot-forming line for the production of a hot-formed and press-hardened sheet steel product, in particular a motor vehicle component, to the state of the art.
  • the hot-forming line has a temperature control station, with areas that are locally different from one another being able to be heated to different temperatures in the temperature control station.
  • the temperature is controlled by a conductive system, using exchangeable temperature control plates for this purpose.
  • a heating device with a lower heating unit and an upper heating unit for heating a metal circuit board is also based on FIG EP 2 216 417 A2 emerged.
  • Each heating unit has a heatable heating plate that comes into contact with the circuit board.
  • the heating plate of the lower and / or the upper heating unit has a plurality of heating segments which are arranged in a predetermined grid relative to one another and which can be displaced relative to one another in the plane defined by a contact surface between the heating segments and the board.
  • the heating segments each have an integrated heating element in the form of resistance heating.
  • the EP 2 182 081 A1 discloses a method and an apparatus for the thermal treatment of a coated sheet steel body. Here, too, the heating takes place via surface elements in the form of contact plates.
  • the object of the present invention is to develop a hot-forming line with improved systems and a rationally designed conductive heating system, which enables efficient heating of metal blanks for hot-forming within the hot-forming line.
  • this object is achieved in a hot-forming line according to the features of claim 1.
  • a method for the production of hot-formed and press-hardened sheet metal products in a hot-forming line according to the invention is the subject of claims 18 to 21.
  • the hot-forming line according to the invention for the production of hot-formed and press-hardened sheet metal products from metal blanks comprises a heating station and a forming station.
  • the heating station has a lower tool and an upper tool, between which a metal plate is received for heating.
  • the heating or heating of a metal plate in the heating station takes place conductively by means of indirect or indirect resistance heating.
  • the heat is generated outside the metal plate and reaches the metal plate itself via its surface.
  • the lower tool and / or the upper tool has an electrical resistance heater with at least one surface heating element.
  • the heat transfer from the surface heating element to the metal plate takes place by conduction as a result of the at least indirect contact between the surface heating element and the metal plate to be heated.
  • the surface heating element is a heating plate with a plate body made of an electrically conductive material, the plate body being designed as a heating conductor.
  • the plate body itself directly forms the heating conductor.
  • the heating conductor defines a current path in the plate body. Electrical energy is converted into heat in the heating conductor.
  • the heating plate comes into contact indirectly or indirectly with the metal plate.
  • the heating surface of a heating plate is provided with electrical insulation or an insulating layer.
  • the heating conductor is preferably configured in such a way that it releases the appropriate amount of heat for heating the metal plate, which is supplied to the metal plates by heat transfer.
  • a heating conductor is formed in the plate body through at least one slot which extends over the thickness of the plate body.
  • the heating conductor is formed by at least one horizontal slot in the plate body. The horizontal slot preferably extends over almost the entire length or width of the plate body. The electrical line or the current path takes place via the area of the plate body that is not separated by the slot.
  • the heating conductor is configured using the slot guide in the plate body.
  • the heating conductor is twisted several times.
  • the heating conductor can run in a meander shape or in a spiral shape.
  • the heating conductor has a length which is longer than the shortest distance between the electrical contacts of the heating conductor. It is also possible for more than one heating conductor to be arranged or designed in an appropriate circuit arrangement in a heating plate.
  • the panel includes at least two panel layers.
  • the plate body layers are arranged one above the other in the manner of a sandwich construction.
  • the plate body layers are electrically insulated from one another by electrical insulation.
  • the plate body layers are electrically connected to one another via a contact section, so that a heating conductor defining the current path is formed.
  • the contact section can be a separate contact component.
  • the contact section is preferably a direct component of the plate body layers. In the area of the contact section, the plate body layers are not electrically insulated from one another, so that the current flow from one plate body layer to the next plate body layer via the contact section.
  • the plate body consists of an electrically conductive material.
  • the material has a high specific resistance and high heat resistance.
  • One aspect of the invention provides that the plate body consists of a metallic heating conductor material.
  • the plate body can also consist of a ceramic heating conductor material.
  • a particularly advantageous heating conductor material within the scope of the invention is stainless austenitic steel with the material number 1.4841 (EN material short name X15CrNiSi25-21), which is standardized in the DIN EN 10095 standard. This steel is heat-resistant and is characterized by its good strength properties even at high temperatures. The range of application is preferably between 900 ° C and 1,120 ° C.
  • the metallic heating conductor materials also include chromium-nickel alloys (CrNi). These can be used up to around 1,200 ° C. Ferritic chromium-iron-aluminum alloys (CrFeAl) for temperatures up to 1400 ° C can also be used.
  • CrNi chromium-nickel alloys
  • CrFeAl Ferritic chromium-iron-aluminum alloys
  • Ceramic heating conductor materials include silicon carbide (SiC). This is usually used up to temperatures of 1,600 ° C. Molybdenum disilicide (MoSi2) is also available for applications up to 1,850 ° C.
  • a ceramic heating conductor material in the form of silicon-infiltrated silicon carbide is also regarded as advantageous.
  • This is silicon carbide with metallic silicon embedded in the crystal.
  • This heating conductor material can be used for operating temperatures up to over 1,300 ° C. Also has it has a very high compressive strength of approx. 2000 MPa even at high temperatures.
  • the heating conductor material is characterized by its good corrosion resistance and wear resistance. Furthermore, the high heat capacity and the low thermal expansion are advantageous.
  • the heating plate is particularly expediently accommodated in an enclosure.
  • the enclosure surrounds or includes the outer side edges of the heating plate.
  • the enclosure is used for thermal and electrical insulation as well as mechanical stabilization.
  • the enclosure can for example consist of a ceramic material.
  • Both the side edges and the back of the heating plate are advantageously provided with thermal insulation.
  • the enclosure and / or thermal insulation can also serve to compensate for tolerances in the thickness or the insertion position of a metal plate.
  • a load distribution plate is arranged in the lower tool and / or in the upper tool.
  • the lower tool and / or the upper tool can be incorporated into the tool frame of the heating station, incorporating the load distribution plate.
  • the load distribution plate can in particular be fixed to a press table by spring elements.
  • the heating plate is provided with electrical insulation on its heating surface contacting the metal plate.
  • This aspect provides for avoiding direct contact between the heating plate and the metal plate by interposing electrical insulation.
  • the electrical insulation can be implemented by coating the heating surface of the heating plate or a separate insulation layer or plate.
  • the electrical current flow can also be maintained during the locking time or phase and thus during the heating of a metal plate. This is more advantageous because constantly changing switching cycles of the electrical system are avoided.
  • the resistance heater advantageously has a number of surface heating elements that can be selectively activated, for example switched on and / or switched off. This makes it possible to heat areas of the metal plate differently or not to heat areas of the metal plate.
  • the surface heating elements can also be heated differently via a controllable voltage or power supply in order to enable a metal plate to be heated in different ways.
  • individual surface heating elements or segments of surface heating elements connected together in groups can be controlled.
  • the activation also includes an optional connection and / or disconnection of heating surface elements.
  • Several different components or metal plates can also be heated in the same heating station by switching the surface heating elements as required. This can be done individually or in groups.
  • the cross section of the heating conductor varies over its length.
  • the heating conductor varies in its width.
  • a temperature or heating control is also possible through a corresponding cross-sectional design of the heating conductor. Since the resistance in the heating conductor changes proportionally to its cross section, the desired amount of heat and the temperature in the course or over the length of the heating conductor or in sections of the heating conductor can be set by varying the cross section.
  • the hot-forming line according to the invention is not only suitable for heating flat metal blanks.
  • Metal blanks with varying thickness or cross-sectional shape for example so-called tailored blanks, can also be brought to forming temperature in the heating station and then hot-formed and press-hardened.
  • one aspect of the invention provides that a receiving space for the metal blank is provided between the lower tool and the upper tool and the receiving space has a geometry that is adapted to the surface contour of the metal blank.
  • the receiving space between the lower tool and the upper tool can also be formed by or in the plate body itself. Different heating temperatures can be set depending on the board thickness.
  • Thickness tolerances of the metal blanks to be heated can be compensated. Tolerance compensation can be implemented, for example, by resilient mounting of the thermal insulation of the lower tool and / or the upper tool.
  • a resilient mounting of the plate body is also conceivable. Furthermore, tolerance compensation is possible via elastic deformability of the thermal insulation itself.
  • An advantageous embodiment of the hot-forming line according to the invention also provides that at least one further heating device can be connected upstream or downstream of the heating station.
  • at least one further heating device can be connected upstream or downstream of the heating station.
  • an additional heating device is connected upstream of the heating station.
  • This design of the hot-forming line provides for a two-stage heating of a metal blank, in which the metal blank is initially preheated to a certain temperature in a first stage. The preheated metal blank is then transferred to the heating station and heated or heated there to the forming temperature.
  • the heating station and the forming station are arranged within a synchronous drive unit. Suitable transfer systems are integrated between the heating station and the forming station. The movement of the lower tool and the upper tool of the heating station and of the lower tool and the upper tool of the forming station takes place synchronously, preferably within a common synchronous drive unit with the same cycle.
  • suitable ones are within the synchronous drive unit between the heating station and the forming station Blank transfer systems provided. It goes without saying that transfer devices or systems are also provided for feeding the metal blank within the hot-forming line to the heating station. The same applies to the removal of the hot-formed sheet metal products from the forming station and / or an additional cooling station that may be connected downstream.
  • the forming and press hardening can be carried out in one tool.
  • Two-stage cooling or a two-stage hardening process is also possible.
  • the heated metal blank is reshaped in the forming station and is already cooled in the particularly actively cooled forming station.
  • the setting of the final temperature and / or the holding of the formed sheet metal product can be implemented in a second cooling stage.
  • the forming station is followed by a separate cooling station.
  • the movement and the cycle control can furthermore be improved in that the heating station and / or the forming station and / or the cooling station of the hot forming line are mounted in a machine frame.
  • one station or all stations are resiliently mounted within the machine frame.
  • the flexible mounting of the stations or of the movable tools of the stations increases the holding time or heating time when the metal blank is heated and / or the forming and cooling time in the forming stage and / or in the cooling stage. In particular, this results in a longer contact time between the upper tool and the lower tool relative to the cycle time.
  • the hot forming line according to the invention is characterized by a rationally designed conductive heating system which enables efficient heating of metal blanks for hot forming and press hardening within the hot forming line.
  • a method for producing hot-formed and press-hardened sheet metal products in a hot-forming line provides that a heating plate of the heating station is at least partially heated to a plate temperature between 1,050 ° C. and 1,350 ° C.
  • the heating plate has an excess temperature compared to the target temperature to which a metal plate is to be heated.
  • the metal plate is then at least partially heated from its initial temperature to the target temperature by contact of the metal plate with the heating plate.
  • the target temperature is preferably between 850 ° C and 970 ° C.
  • the heating of the metal plate is carried out in a time of 10 seconds or less. In particular, the heating takes place in a time between 3 and 6 seconds.
  • One aspect of the invention provides that the excess temperature of the heating plates is between 20% and 30% above the target temperature of the metal plates to which the metal plates are to be heated in the heating station.
  • the heated metal blank is transferred from the heating station to the forming station in a time of a maximum of 3 seconds. Heat losses can be minimized due to the short transfer time.
  • the transfer of the formed metal blank or the sheet metal product from the forming station to the cooling station is also carried out in a maximum of 3 seconds. In this way, in turn, heat losses can be avoided and distortion of the formed sheet metal product can be prevented or minimized.
  • the hot-forming line and method according to the invention is for the production of hot-formed and press-hardened sheet metal products from metal blanks.
  • the formed sheet metal product is at least partially press hardened while it is clamped in the forming tool.
  • the sheet metal product in the forming station is at least partially cooled to a temperature of less than or equal to ( ⁇ ) 250 ° C. in a time of less than or equal to ( ⁇ ) 10 seconds, in particular in a tent between 3 and 6 seconds.
  • a cooling station can be connected downstream of the reforming station. The cooling and hardening can then be carried out in the cooling station alone. It is also possible to cool the hot-formed sheet metal product both in the forming station and in a downstream cooling station.
  • cooling In a downstream cooling station, there is then further cooling or the sheet metal product is kept at the cooling temperature.
  • the cooling can take place, for example, in a plunge pool.
  • cooling can also take place in a press hardening tool or a contact cooling station. This is made in particular of light metal with a high thermal conductivity and has cooling channels for the passage of a cooling medium.
  • a hot-forming line for the production of hot-formed and press-hardened sheet metal products from metal blanks comprises a heating station 1 for heating the metal blanks and a forming station 2 for shaping the metal blanks in the heated state.
  • the heating station is marked with 1 and the forming station with 2 in the figures.
  • a forming station 2 is shown in FIG Figures 8 , 9 and 10 .
  • FIG Figure 3 The basic structure of a heating station 1 is illustrated in FIG Figure 3 described.
  • parts 15 to 18 that correspond to one another have the same reference numerals.
  • the heating station 1 has a lower tool 3 and an upper tool 4.
  • a receiving space 5 is provided between the lower tool 3 and the upper tool 4, between which a metal plate 6 is received for heating.
  • the lower tool 3 and the upper tool 4 can be opened and closed by drive means. Here, the lower tool 3 and the upper tool 4 are moved relative to one another or moved away from one another. When a metal plate 6 is heated, the lower tool 3 and the upper tool 4 come into direct or indirect contact with the surface of the metal plate 6.
  • the lower tool 3 and / or the upper tool 4 have an electrical resistance heater 7 with at least one surface heating element.
  • the surface heating element is a heating plate 8.
  • the heating plate 8 has a plate body 9 made of an electrically conductive material.
  • a heating conductor 11 is formed through at least one slot 10 or the plate body 9 itself forms the heating conductor 11 of the same material.
  • the heating conductor 11 defines the current path between the electrical contacts 12, 13 of the heating plate 8.
  • the positive contact 12 (positive pole) is indicated in the figures by the sign "+” and the negative contact 13 (negative pole) is indicated by the sign "-".
  • the slot 10 extends over the entire thickness d of the plate body 9.
  • the width of a slot 10 is sufficiently dimensioned so that insulation between the heating conductor sections running parallel to one another is ensured and no current flashover occurs.
  • the slot 10 can also be filled with an electrical insulator material.
  • the heating conductor 11 is wound several times.
  • the heating conductor 11 runs in a meandering manner.
  • the heating conductor 11 is implemented here by a multiplicity of individual slots 10 in the plate body 9 arranged parallel to one another at a distance.
  • the individual slots 10 are alternately guided into the plate body 9 from opposite side edges.
  • the individual slots 10 then each end a little before the opposite side edge.
  • the plate body 9 of the heating plate 8 can consist of a metallic heating conductor material, in particular a stainless, heat-resistant austenitic chromium-nickel steel 1.4841. Furthermore, the plate body 9 can consist of a ceramic heating conductor material, in particular of silicon carbide (SiC) or of silicon-infiltrated silicon carbide (SiSiC).
  • the length of the heating conductor 11 is greater or longer than the shortest distance k1, k2 between the electrical contacts 12, 13 of the heating conductor 11.
  • the heating conductor 11 runs in a spiral.
  • the slot 10 extends in a spiral, whereby the spiral heating conductor 11 is formed.
  • the heating conductor 11 has a constant one Width b11.
  • FIGS. 11b and 11c further show two side views of the plate body 9 according to FIG Figure 11a .
  • the slot 10 extends over the entire thickness d of the plate body 9.
  • FIG. 12 Another design variant is through the Figure 12 shown in which a plurality of spiral heating plates 8 are arranged next to one another, the heating conductor 11 of each heating plate 8 being formed by a slot 10 in each case.
  • each heating conductor 11 is supplied with voltage or current via an electrical contact 13 and two electrical contacts 12. It can also be seen that the length LS of each heating conductor 11 is greater or longer than the shortest distance k2 between the electrical contacts 12, 13.
  • the Figure 2 shows the heating plate 8 with an enclosure 16 enclosing its side edges 14, 15.
  • the enclosure 16 is used for mechanical stabilization and / or thermal insulation of the heating plate 8.
  • the heating station 1 shown has a lower tool 3 and an upper tool 4. In the embodiment shown here, a total of five heating plates 8 are arranged in the upper tool 4.
  • the metal plate 6 to be heated is in the Figure 3a ) shown in dashed lines. The metal plate 6 is used to manufacture a hot-formed and press-hardened B-pillar for a motor vehicle.
  • Thermal insulation in the form of a lower insulating plate 17 and an upper insulating plate 18 is provided both in the lower tool 3 and in the upper tool 4.
  • a load distribution plate 19, 20 is provided both in the lower tool 3 and in the upper tool 4.
  • the upper insulating plate 18 forms thermal insulation for the rear side 21 and the side edges 14, 15 of the heating plate or plates 8.
  • the metal plate 6 to be heated rests on the lower insulating plate 17 of the lower tool 3 for the heating process.
  • the heating surface 22 of the heating plates 8 directed towards the metal plate 6 is separated from the metal plate 6 by electrical insulation in the form of an insulating layer 23.
  • the electrical insulating layer 23 can be designed as a coating on the heating surfaces 22 of the heating plate 8.
  • the electrical insulating layer 23 can be designed as an insulating layer made of an electrical insulating material.
  • the arrangement of the heating plates 8 is matched to the outer contour or surface of a metal plate 6 to be heated.
  • the metal blanks 6 can be completely heated to a predeterminable temperature, for example the hardening temperature of the respective metal material, in particular the austenitizing temperature Ac3. It is also possible to partially heat the metal plates 6 differently, so that the metal plate 6 has areas or sections with different temperatures from one another.
  • the heating plates 8 or the heating surface elements can optionally be controlled, for example switched on and off, or else heated differently.
  • the heating station 1 as in the Figure 4 shown, has an electrical resistance heater 7 with surface heating elements in the form of heating plates 8 both in the lower tool 3 and in the upper tool 4.
  • both the heating surface or the heating surfaces 22 of the upper heating plates 8 and the heating surfaces 22 of the lower heating plates 8 are provided with a puncture-proof insulating layer 23.
  • the lower insulating plate 17 accommodates the heating plates 8 and forms thermal insulation for the rear sides 21 and the side edges 14, 15 of the heating plates 8.
  • the heating station 1 in the embodiment according to FIG Figure 4 Due to its design with a double resistance heater 7, it is particularly suitable for heating thicker metal plates 6.
  • metal plates 6 are arranged parallel to one another in the transverse direction.
  • the metal plates 6 shown here are used to manufacture door impact beams.
  • the Figures 6 and 7 show heating stations 1 each with eight heating plates 8 and 8 '.
  • the arrangement and heating of the heating plates 8, 8 ' is selected such that sections of the metal plates 6 are tempered differently. Edge areas and / or central areas of the metal blanks 6 can thus be brought to different forming temperatures.
  • the heating surface elements or the heating plates 8, 8 'can be regulated and activated.
  • heating plates 8, 8 'can also be switched on or off.
  • a higher temperature can be set via the middle or central heating plates 8 'than in the outer heating plates 8.
  • the metal plate 6 is heated more in the longitudinal direction in a middle section 24 than in the plate edge sections 24' and in the lower and upper wing sections 24 ".
  • the cross section of the heating conductor 11 varies over its length. This is implemented via the spacing a1, a2, a3 between the individual slots 10 in the plate body 9. As a result of the change in the cross section of the heating conductor 11, it is heated to different degrees.
  • the electrical resistance changes inversely proportional to the cross section of the heating conductor 11. Accordingly, heating conductor sections with a larger cross section have a lower electrical resistance than heating conductor sections with a smaller cross section.
  • the heating conductor 11 is consequently heated less strongly in heating conductor sections with a larger cross section than in heating conductor sections with a smaller cross section; accordingly, zones or areas are formed in the heating plate 8 which are heated to different degrees.
  • the different zones or areas are in the Figure 13b ) marked with> Ac3, ⁇ Ac1 and> Ac1.
  • a metal plate 6 is heated to a temperature above the austenitizing temperature Ac3.
  • the heating plate 8 in this zone has a higher temperature (excess temperature) compared to the target temperature of the metal plate 6.
  • the excess temperature is preferably> 1,050 ° C, but in particular a maximum of 1,350 ° C.
  • a temperature below the austenitizing temperature Ac1 is reached in the area ⁇ Ac1 and a temperature above the austenitizing temperature Ac1 is reached in the area or zone> Ac1.
  • the heating plate 8 has a temperature of, for example, ⁇ 800 ° C. in the zone ⁇ Ac1, whereas it has a temperature of> 800 ° C. in the zone> Ac1, but preferably a maximum of 950 ° C.
  • the heating station 1 as shown in FIG Figure 14 comprises a lower tool 3 and an upper tool 4, surface heating elements in the form of heating plates 8 being provided in the upper tool 4.
  • FIG. 14c The cross-sectional representation of Figure 14c ) that cut the BB through the Figure 14a ) shows, makes it clear that the thickness of a heating conductor 11 varies.
  • Edge sections 32 of the heating conductor 11 are thicker than the central section 33 of the heating conductor 11. Since the resistance of the heating conductor 11 is greater in the central section with a smaller cross section than in the edge sections 32 with a larger cross section, the heating conductor 11 is less heated in the edge sections 32.
  • edge areas 34 of the metal plates 6 are heated to a lesser extent by this heating conductor configuration. As a result, no complete hardening occurs in the edge regions 34 of the components that are hot-formed and press-hardened from the metal blanks 6.
  • the Figure 15a ) and b) shows the embodiment of a heating station 1 for heating metal blanks 6, which have a different cross-sectional or thickness profile.
  • the receiving space is matched to the surface contour of the metal plate 6 and has a geometry corresponding to the metal plate 6. This is implemented by the shape of the heating plates 8 arranged in the upper tool 4 or their plate bodies 9.
  • the sections of the metal plate 6, which vary in their geometry, are shown in FIG Figure 15b ) marked by s1 to s5.
  • the geometry of the receiving space 5 and the heating plates 8 varies analogously.
  • the thickness or the cross section of the heating conductor 11 varies s3 a temperature of> 1,000 ° C is set.
  • the cross section of the heating conductor 11 in section s1 or s5 is larger, with the result that lower heating temperatures are present there, for example ⁇ 950 ° C.
  • the embodiment of a heating station 1 shown here varies both the cross-sectional profile of the heating plates 8 arranged in the lower tool 3 and the cross-sectional profile of the heating plates 8 integrated in the upper tool 4 and has a corresponding geometry.
  • the shortest distance k3 between the electrical contacts 12, 13 of the heating conductor 11 extends diagonally across the heating plate 8.
  • the heating conductor 11 is wound several times in a meandering manner and has a length that is several times greater than the shortest distance k3.
  • the Figure 8 shows a section of a hot forming line.
  • a heating station 1 and a forming station 2 are shown.
  • the heating station 1 and the forming station 2 are arranged within a synchronous drive unit 26.
  • the synchronous drive unit 26 is a press, in particular an eccentric press. In the cycle of the synchronous drive unit 26, the lower tool 3 or the upper tool 4 of the heating station 1 and the forming tools of the forming station 2 are moved relative to one another.
  • a heating device 27 connected upstream of the heating station 1 is provided outside the synchronous drive unit 26, a heating device 27 connected upstream of the heating station 1 is provided.
  • the metal blanks are homogeneously preheated before they are transferred to the heating station 1.
  • the metal blank 6 is then heated to forming temperature in the heating station 1 and then transferred to the forming station 2 by a blank transfer system (not shown here).
  • the metal blank 6 can be heated homogeneously, that is to say to a total of the same forming temperature. As described above, a partially different heating of a metal blank 6 is also possible.
  • the metal blank 6 is hot-formed.
  • the formed metal blank 6 can already be at least partially cooled and hardened in the forming station 2.
  • a cooling station 28 connected downstream of the forming station 2 is also integrated in the synchronous drive unit 26.
  • the still hot sheet metal product formed in the forming station 2 from the metal blank 6 is transferred to the cooling station 28 by means of a transfer system, also not shown here, and here either further hardened by further cooling.
  • the cooling station 28 opens and closes in rhythm, preferably synchronously with the heating station 1 and the forming station 2.
  • FIG Figure 9 A variant of a hot forming line in which two heating stations 1a and 1b, a forming station 2 and a cooling station 28 are arranged within a synchronous drive unit 26 is shown in FIG Figure 9 .
  • a metal blank is heated in particular homogeneously to a specific preheating temperature.
  • the metal blank is then transferred to the heating station 1b and there it is partially further heated in certain areas or also partially cooled by contact with non-heated heating plates 8.
  • the tempered that is, the temperature-adjusted metal blank is transferred to the forming station 2 and formed into a sheet metal product. Trimming operations, for example punching operations on the sheet metal product, can also be carried out in the forming station 2. Transfer systems then transfer the sheet metal product to the cooling station 28. Here, if necessary, further punching or trimming operations are carried out and the sheet metal product is press-hardened.
  • the Figure 10 shows a technically schematic representation of a heating station 1, a forming station 2 and a cooling station 28, which are arranged together in a synchronous drive unit 26.
  • the upper tools and lower tools of heating station 1, forming station 2 and cooling station 28 are moved relative to one another.
  • the heating station 1 and the forming station 2 as well as the cooling station 28 are elastically mounted on spring elements 30 in a machine frame 29 of the synchronous drive unit 26, which is only shown schematically here.
  • the Figure 10a shows the synchronous drive unit 26 in the open position.
  • the heating station 1, the forming station 2 and the cooling station 28 are also open.
  • a metal blank 6 can be seen in the heating station 1.
  • the metal blank 6 is formed into a sheet metal product 31.
  • the hot sheet metal product 31 is cooled from a temperature above an austenitizing temperature and press hardened.
  • the Figure 10b shows an operating situation in which the synchronous drive unit 26 is closed and the respective lower tools and upper tools with the metal blank 6 or the sheet metal product 31 come to rest.
  • the machine frame 29 of the synchronous drive unit 26 with the heating station 1, the forming station 2 and the cooling station 28 is moved downwards against the force of the spring elements 30. This is in the Figure 10c ) shown.
  • the movement when closing and opening heating station 1, forming station 2 and cooling station 28 is elastically supported by spring elements 30.
  • an electrical resistance heater of a heating station is shown schematically.
  • the resistance heater has a surface heating element in the form of a heating plate 35 both in the lower tool, not shown here, and in the upper tool.
  • a heating plate 35 has a plate body 36 made of an electrically conductive material.
  • the plate body 36 is separated by a horizontal slot 37 over most of its length. Through the horizontal slot 37, the plate body 36 is designed as a heating conductor 38 which defines a current path.
  • the current path is indicated by the arrows P. It can be seen that the slot 37 does not completely separate the plate body 36, so that the plate body 36 is not interrupted at the end 39 of the plate body 36.
  • the slot 37 can be filled with an electrical insulating material.
  • the board comes into direct contact with the heating plates 35.
  • the heating plates 35 are connected in parallel with one another and have equal resistances. During the contact, further current flow is possible to heat the heating plates 35 and thus the metal plate. Since the opposing areas of the heating plate 35, which are connected to one another in the closed state by the metal plate, have the same electrical potential (voltage level) at every point, there is no short circuit.
  • FIG Figure 18 An alternative embodiment of a heating plate 40 is shown in FIG Figure 18 shown.
  • the plate body 41 of the heating plate 40 has two plate body layers 42, 43 arranged one above the other. Electrical insulation 44 is provided between the plate body layers 42, 43. The electrical insulation 44 extends over the essential part of the length L of the plate body 41, so that these are electrically insulated from one another in some areas.
  • a contact section 46 is formed at the end 45 of the plate body 41. In the contact section 46, the plate body layers 42, 43 contact one another and are connected to one another in an electrically conductive manner. In this way, a U-shaped configured heating conductor 47 is formed in the plate body 41.
  • the current path is identified by the arrows P.
  • the shortest distance between the electrical contacts is marked with k4.
  • the heating conductor 38 as well as the heating conductor 47 have a length which is longer than the shortest distance k4 between the electrical contacts “+” and “-”.
  • the metal blanks are heated to forming temperature in a heating station 1, then removed from heating station 1 and transferred to forming station 2 within a time T1 of less than 3 seconds.
  • the forming into the sheet metal product then takes place in the forming tool 2.
  • the hot sheet metal product is cooled at a cooling rate which is above the critical cooling rate of the metal material and is hardened in this way.
  • the cooling takes place in a time T K of less than or equal to () 10 seconds, in particular in a time between 3 and 6 seconds.
  • the sheet metal product is cooled to a temperature T E of less than or equal to ( ⁇ ) 250 ° C.
  • the transfer of the heated metal blank from the heating station 1 to a downstream cooling station 28 takes place in a time t T2 of a maximum of 3 seconds.
  • An advantageous aspect of the method according to the invention provides that a heating plate 8 of the heating station 1 is at least partially heated to a plate temperature T P between 1,050 ° C. and 1,350 ° C.
  • a metal blank is then at least partially heated in the heating station 1, namely from an initial temperature T1 to a target temperature T2, in that the metal blank comes into contact with the heating plate 8 of the upper and / or lower tool.
  • the Target temperature T2 is between 850 ° C and 900 ° C.
  • the metal blank is heated to the target temperature T2 in a time t E of less than or equal to () 10 seconds, in particular in a time between 4 and 6 seconds.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)

Claims (21)

  1. Ligne de formage à chaud avec un poste de chauffage (1) et un poste de formage (2) en vue de la fabrication de produits de tôle (31) formés à chaud et trempés sous presse à partir de flans métalliques (6), dans laquelle le poste de chauffage (1) comporte un outil inférieur (3) et un outil supérieur (4) entre lesquels un flan métallique (6) peut être logé pour être chauffé et l'outil inférieur (3) et/ou l'outil supérieur (4) comportent un chauffage par résistance électrique (7) avec au moins un élément chauffant de surface et l'élément chauffant de surface est une plaque chauffante (8, 8', 35, 40) et la plaque chauffante (8, 8', 35, 40) est réalisée comme corps de plaque (9, 36, 41) à partir d'un matériau électriquement conducteur et le corps de plaque (9, 36, 41) est réalisé comme conducteur chauffant (11, 38, 47), caractérisée en ce que la plaque chauffante (8) est munie d'une couche isolante électrique (23) au niveau de sa surface chauffante (22) en contact avec le flan métallique (6).
  2. Ligne de formage à chaud selon la revendication 1, caractérisée en ce que le conducteur chauffant (11) a une longueur qui est plus longue que la plus courte distance (k1, k2, k3, k4) entre les contacts électriques (12, 13) du conducteur chauffant (11).
  3. Ligne de formage à chaud selon la revendication 1 ou 2, caractérisée en ce que le conducteur chauffant (11, 38, 47) s'étend en tournant de multiples fois, en particulier en forme de méandres ou en forme de spirales.
  4. Ligne de formage à chaud selon l'une quelconque des revendications 1 à 3, caractérisée en ce que le conducteur chauffant (11) est réalisé dans le corps de plaque (9) par au moins une fente (10) qui s'étend sur l'épaisseur (d) du corps de plaque (9).
  5. Ligne de formage à chaud selon l'une quelconque des revendications 1 à 3, caractérisée en ce que le conducteur chauffant (38) est réalisé dans le corps de plaque (36) par une fente horizontale (37).
  6. Ligne de formage à chaud selon l'une quelconque des revendications 1 à 3, caractérisée en ce que le corps de plaque (41) comprend au moins deux couches de corps de plaque (42, 43) agencées l'une au-dessus de l'autre, lesquelles couches de corps de plaque (42, 43) sont isolées électriquement l'une de l'autre au moins par endroits et sont reliées électriquement l'une à l'autre par l'intermédiaire d'une partie de contact.
  7. Ligne de formage à chaud selon l'une quelconque des revendications 1 à 6, caractérisée en ce que le corps de plaque (9, 36, 41) est constitué d'un matériau métallique de conducteur chauffant.
  8. Ligne de formage à chaud selon l'une quelconque des revendications 1 à 6, caractérisée en ce que le corps de plaque (9, 36, 41) est constitué d'un matériau céramique de conducteur chauffant.
  9. Ligne de formage à chaud selon l'une quelconque des revendications 1 à 8, caractérisée en ce que la plaque chauffante (8) est logée dans un cadre (16) entourant ses bords latéraux (14, 15).
  10. Ligne de formage à chaud selon l'une quelconque des revendications 1 à 9, caractérisée en ce que le chauffage par résistance (7) comporte un certain nombre d'éléments chauffants de surface commandables sélectivement.
  11. Ligne de formage à chaud selon l'une quelconque des revendications 1 à 10, caractérisée en ce que la section transversale du conducteur chauffant (11) varie sur sa longueur.
  12. Ligne de formage à chaud selon l'une quelconque des revendications 1 à 11, caractérisée en ce qu'un espace de logement (5) destiné au flan métallique (6) est prévu entre l'outil inférieur (3) et l'outil supérieur (4) et l'espace de logement (5) a une géométrie adaptée au contour de surface du flan métallique (6).
  13. Ligne de formage à chaud selon l'une quelconque des revendications 1 à 12, caractérisée en ce qu'au moins un autre dispositif de chauffage (27) est placé en amont ou en aval du poste de chauffage (1).
  14. Ligne de formage à chaud selon l'une quelconque des revendications 1 à 13, caractérisée en ce que le poste de chauffage (1) et le poste de formage (2) sont agencés à l'intérieur d'une unité d'entraînement synchrone (26).
  15. Ligne de formage à chaud selon la revendication 14, caractérisée en ce qu'un système de transfert de flans est prévu à l'intérieur de l'unité d'entraînement synchrone (26) entre le poste de chauffage (1) et le poste de formage (2).
  16. Ligne de formage à chaud selon l'une quelconque des revendications 1 à 15, caractérisée en ce qu'un poste de refroidissement (28) séparé est placé en aval du poste de formage (2).
  17. Ligne de formage à chaud selon l'une quelconque des revendications 1 à 16, caractérisée en ce que le poste de chauffage (1) et/ou le poste de formage (2) et/ou le poste de refroidissement (28) sont montés dans un bâti de machine (29) avec un système de suspension élastique.
  18. Procédé de fabrication de produits de tôle formés à chaud et trempés sous presse dans une ligne de formage à chaud selon l'une quelconque des revendications 1 à 17, caractérisé en ce qu'une plaque chauffante du poste de chauffage (1) est chauffée au moins partiellement à une température de plaque TP entre 1050 °C et 1 350 °C et, dans le poste de chauffage (1), le chauffage au moins partiel d'un flan métallique (6) d'une température de départ T1 à une température d'arrivée T2 est effectué par contact du flan métallique (6) avec la plaque chauffante, laquelle température d'arrivée T2 est comprise entre 850 °C et 970°C, et le chauffage s'effectue en un temps t inférieur ou égal à (≤) 10 secondes, en particulier en un temps compris entre 3 et 6 secondes.
  19. Procédé selon la revendication 18, caractérisé en ce que le transfert du flan métallique chauffé hors du poste de chauffage (1) jusque dans le poste de formage (2) est effectué en un temps tT1 de 3 secondes au maximum.
  20. Procédé selon la revendication 18 ou 19, dans lequel un poste de refroidissement est placé en aval du poste de formage, caractérisé en ce que le transfert du flan métallique formé hors du poste de formage (2) jusque dans un poste de refroidissement (28) est effectué en un temps tT2 de 3 secondes au maximum.
  21. Procédé selon l'une quelconque des revendications 18 à 20, dans lequel le produit de tôle formé est au moins partiellement trempé sous presse, caractérisé en ce que le produit de tôle est refroidi dans le poste de formage (2) et/ou dans un poste de refroidissement (28) placé en aval en un temps tK inférieur ou égal à (≤) 10 secondes, en particulier en un temps compris entre 3 et 6 secondes, au moins partiellement à une température TE inférieure ou égale à (≤) 250 °C.
EP15154074.7A 2014-02-07 2015-02-06 Ligne moulée à chaud et procédé de fabrication de produits de tôle moulés à chaud Active EP2907881B2 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102014101539.8A DE102014101539B9 (de) 2014-02-07 2014-02-07 Warmformlinie und Verfahren zur Herstellung von warmumgeformten Blechprodukten

Publications (4)

Publication Number Publication Date
EP2907881A2 EP2907881A2 (fr) 2015-08-19
EP2907881A3 EP2907881A3 (fr) 2015-09-30
EP2907881B1 EP2907881B1 (fr) 2019-04-24
EP2907881B2 true EP2907881B2 (fr) 2021-11-10

Family

ID=52462183

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15154074.7A Active EP2907881B2 (fr) 2014-02-07 2015-02-06 Ligne moulée à chaud et procédé de fabrication de produits de tôle moulés à chaud

Country Status (4)

Country Link
US (1) US20170066030A1 (fr)
EP (1) EP2907881B2 (fr)
CN (2) CN104894352B (fr)
DE (1) DE102014101539B9 (fr)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014112244A1 (de) * 2014-08-26 2016-03-03 Benteler Automobiltechnik Gmbh Verfahren und Presse zur Herstellung wenigstens abschnittsweise gehärteter Blechbauteile
DE102015101668A1 (de) * 2015-02-05 2016-08-11 Benteler Automobiltechnik Gmbh Zweifach fallendes Heiz- und Formwerkzeug sowie Verfahren zur Herstellung warmumgeformter und pressgehärteter Kraftfahrzeugbauteile
DE102015106298B4 (de) * 2015-04-24 2017-01-26 Semikron Elektronik Gmbh & Co. Kg Vorrichtung, Verfahren und Anlage zur inhomogenen Abkühlung eines flächigen Gegenstandes
DE102015215179A1 (de) * 2015-08-07 2017-02-09 Schwartz Gmbh Verfahren zur Wärmebehandlung und Wärmebehandlungsvorrichtung
DE102015121842B4 (de) * 2015-12-15 2018-11-29 Benteler Automobiltechnik Gmbh Verfahren zum Betreiben einer Temperierstation
DE102015122796A1 (de) * 2015-12-23 2017-06-29 Benteler Automobiltechnik Gmbh Warmformlinie zur Herstellung warmumgeformter und pressgehärteter Stahlblechprodukte sowie Verfahren zu dessen Betreibung
DE102016101975B4 (de) 2016-02-04 2017-10-19 Voestalpine Metal Forming Gmbh Vorrichtung zum Herstellen von gehärteten Stahlbauteilen und Verfahren zum Härten
DE102016113403B4 (de) 2016-07-20 2018-10-18 Benteler Automobiltechnik Gmbh Temperierstation sowie Verfahren zum Betreiben der Temperierstation
DE102017113592B4 (de) 2016-07-20 2018-12-06 Benteler Automobiltechnik Gmbh Verfahren zur Herstellung formgehärteter Fahrzeugbauteile mit unterschiedlichen mechanischen Eigenschaften und Temperiervorrichtung
EP3276012A1 (fr) * 2016-07-29 2018-01-31 Benteler Automobiltechnik GmbH Station de chauffage avec conducteur chauffant en gaine
EP3507038B1 (fr) 2016-08-30 2021-07-28 Magna International Inc. Outil muni d'un dispositif de chauffage destiné à former des pièces présentant des propriétés personnalisées
CN107052172B (zh) * 2017-06-12 2019-08-09 中船黄埔文冲船舶有限公司 一种双曲度板加工方法及该方法使用的火工工装
DE102017223252A1 (de) * 2017-12-19 2019-06-19 Volkswagen Aktiengesellschaft Pressenanordnung sowie Verfahren zur Herstellung eines warmumgeformten und pressgehärteten Stahlblechteils
EP3778054B1 (fr) * 2019-08-14 2021-12-01 Automation, Press and Tooling, AP & T AB Station de chauffage intermédiaire
CN110773630B (zh) * 2019-11-05 2022-02-11 山东钢铁集团日照有限公司 一种解决不规则坯料导电加热温度不均匀的方法
US20210213510A1 (en) * 2020-01-10 2021-07-15 TE Connectivity Services Gmbh Heated guide track for a press machine for manufacturing a strip
DE102020127057A1 (de) 2020-10-14 2022-04-14 Benteler Automobiltechnik Gmbh Verfahren zur Herstellung einer Stahlplatine sowie Temperierstation
WO2024038475A1 (fr) * 2022-08-16 2024-02-22 M.I.T. S.R.L. Élément chauffant à résistance électrique, plus particulièrement résistance à élément distribué et procédé de réalisation d'un tel élément chauffant

Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3495328A (en) † 1967-07-07 1970-02-17 Corning Glass Works Electric heating unit
GB2361412A (en) † 2000-02-08 2001-10-24 Bsh Bosch Siemens Hausgeraete Toaster with electrically insulating contact plate
WO2006037588A1 (fr) † 2004-10-05 2006-04-13 Aleris Aluminum Koblenz Gmbh Procede de traitement thermique d'un element d'alliage en aluminium et appareil correspondant
WO2008107265A1 (fr) † 2007-03-02 2008-09-12 Kraussmaffei Technologies Gmbh Outil pouvant être chauffé
EP2014777A1 (fr) † 2007-07-11 2009-01-14 Neue Materialien Bayreuth GmbH Procede et dipositif pour le traitement thermique d une tole metallique
EP2216417A2 (fr) † 2009-02-07 2010-08-11 Schuler SMG GmbH & Co. KG Dispositif de chauffage destiné à réchauffer une platine métallique
WO2010150683A1 (fr) † 2009-06-22 2010-12-29 新日本製鐵株式会社 Procédé de pressage à chaud pour tôles d'acier, dispositif de pressage à chaud pour tôles d'acier et élément formé en acier
US20110042369A1 (en) † 2008-01-25 2011-02-24 Aisin Takaoka Co., Ltd. Heating equipment for a plate to be heated and heating method
EP2395116A2 (fr) † 2010-06-11 2011-12-14 Toyoda Iron Works Co., Ltd. Dispositif de chauffage de feuille d'acier, procédé pour produire une pièce formée de presse et pièce formée de presse
US20130068756A1 (en) † 2011-09-16 2013-03-21 Benteler Automobiltechnik Gmbh Method and apparatus for heating a metal plate
US8479552B1 (en) † 2007-05-22 2013-07-09 Temper Ip, Llc Method and die for forming a tubular blank into a structural component
DE202013103764U1 (de) † 2013-08-20 2013-10-23 Benteler Automobiltechnik Gmbh Temperierstation mit Induktorerwärmung
EP2842738A1 (fr) † 2013-08-26 2015-03-04 FCT Hartbearbeitungs GmbH Élément de chauffage en céramique et outil de façonnage, et procédé de fabrication d'un élément de chauffage en céramique

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1010211B (de) * 1954-12-24 1957-06-13 Deutsche Edelstahlwerke Ag Verfahren und Vorrichtung zum elektrischen Widerstandserhitzen von metallischem Halbzeug zum Zwecke einer unmittelbar anschliessenden Warmverformung
SE435527B (sv) 1973-11-06 1984-10-01 Plannja Ab Forfarande for framstellning av en detalj av herdat stal
JP2003053470A (ja) * 2001-08-17 2003-02-26 Ohbayashi Corp 鋼板材の成形装置および成形方法
DE10212819B4 (de) 2002-03-22 2004-07-08 Benteler Automobiltechnik Gmbh Verfahren zur Herstellung eines metallischen Bauteils
JP2005131665A (ja) * 2003-10-30 2005-05-26 Komatsu Sanki Kk プレス加工方法
DE102006037637A1 (de) 2006-08-10 2008-02-14 Müller Weingarten AG Verfahren und Vorrichtung zum konduktiven Erwärmen von Metallblechen
CN101265515A (zh) * 2007-12-26 2008-09-17 上海电气电站设备有限公司 汽轮机转子局部去应力热处理方法
EP2182081B1 (fr) 2008-10-29 2014-01-22 Neue Materialien Bayreuth GmbH Procédé destiné au traitement thermique d'un corps en tôle d'acier revêtu
CN101619383B (zh) * 2009-08-05 2011-06-29 吉林诺亚机电科技有限公司 一种高强度钢板冲压件的热成形法
DE102010027554A1 (de) * 2010-07-19 2012-01-19 Thyssenkrupp Umformtechnik Gmbh Umformwerkzeug und Verfahren zum Warmumformen und partiellen Presshärten eines Werkstückes aus Stahlblech
DE102011102167A1 (de) * 2011-05-21 2012-11-22 Volkswagen Aktiengesellschaft Verfahren zur Herstellung eines Formbauteils mit mindestens zwei Gefügebereichen unterschiedlicher Duktilität und Erwärmungseinrichtung
DE102012110650C5 (de) 2012-11-07 2017-12-14 Benteler Automobiltechnik Gmbh Warmformlinie zur Herstellung warmumgeformter und pressgehärteter Stahlblechprodukte
DE102012110649C5 (de) 2012-11-07 2018-03-01 Benteler Automobiltechnik Gmbh Warmformlinie sowie Verfahren zur Herstellung eines warmumgeformten und pressgehärteten Kraftfahrzeugbauteils

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3495328A (en) † 1967-07-07 1970-02-17 Corning Glass Works Electric heating unit
GB2361412A (en) † 2000-02-08 2001-10-24 Bsh Bosch Siemens Hausgeraete Toaster with electrically insulating contact plate
WO2006037588A1 (fr) † 2004-10-05 2006-04-13 Aleris Aluminum Koblenz Gmbh Procede de traitement thermique d'un element d'alliage en aluminium et appareil correspondant
WO2008107265A1 (fr) † 2007-03-02 2008-09-12 Kraussmaffei Technologies Gmbh Outil pouvant être chauffé
US8479552B1 (en) † 2007-05-22 2013-07-09 Temper Ip, Llc Method and die for forming a tubular blank into a structural component
EP2014777A1 (fr) † 2007-07-11 2009-01-14 Neue Materialien Bayreuth GmbH Procede et dipositif pour le traitement thermique d une tole metallique
US20110042369A1 (en) † 2008-01-25 2011-02-24 Aisin Takaoka Co., Ltd. Heating equipment for a plate to be heated and heating method
EP2216417A2 (fr) † 2009-02-07 2010-08-11 Schuler SMG GmbH & Co. KG Dispositif de chauffage destiné à réchauffer une platine métallique
WO2010150683A1 (fr) † 2009-06-22 2010-12-29 新日本製鐵株式会社 Procédé de pressage à chaud pour tôles d'acier, dispositif de pressage à chaud pour tôles d'acier et élément formé en acier
EP2395116A2 (fr) † 2010-06-11 2011-12-14 Toyoda Iron Works Co., Ltd. Dispositif de chauffage de feuille d'acier, procédé pour produire une pièce formée de presse et pièce formée de presse
US20130068756A1 (en) † 2011-09-16 2013-03-21 Benteler Automobiltechnik Gmbh Method and apparatus for heating a metal plate
DE202013103764U1 (de) † 2013-08-20 2013-10-23 Benteler Automobiltechnik Gmbh Temperierstation mit Induktorerwärmung
EP2842738A1 (fr) † 2013-08-26 2015-03-04 FCT Hartbearbeitungs GmbH Élément de chauffage en céramique et outil de façonnage, et procédé de fabrication d'un élément de chauffage en céramique

Also Published As

Publication number Publication date
CN108486325A (zh) 2018-09-04
DE102014101539A1 (de) 2015-08-13
CN104894352A (zh) 2015-09-09
EP2907881A3 (fr) 2015-09-30
CN104894352B (zh) 2018-04-24
DE102014101539B4 (de) 2016-06-16
US20170066030A1 (en) 2017-03-09
DE102014101539B9 (de) 2016-08-11
EP2907881B1 (fr) 2019-04-24
EP2907881A2 (fr) 2015-08-19

Similar Documents

Publication Publication Date Title
EP2907881B2 (fr) Ligne moulée à chaud et procédé de fabrication de produits de tôle moulés à chaud
EP2014777B1 (fr) Procédé et dispositif pour le traitement thermique d'une tôle métallique
EP2497840B2 (fr) Système de four pour le réchauffage partiel d'ébauches métalliques
EP2730665B1 (fr) Ligne moulée à chaud et procédé de fabrication d'un composant de véhicule automobile déformé à chaud et durci à la presse
EP2414551B1 (fr) Procédé de production d'un élément, en particulier d'une partie de carrosserie, et chaîne de fabrication permettant de mettre en oeuvre ledit procédé
EP2883967B1 (fr) Procédé et dispositif de post-traitement d'un élément de formage métallique durci au moyen du chauffage par résistance électrique
DE102015101668A1 (de) Zweifach fallendes Heiz- und Formwerkzeug sowie Verfahren zur Herstellung warmumgeformter und pressgehärteter Kraftfahrzeugbauteile
DE102005055494B3 (de) Verfahren zum Herstellen von einem Bauteil aus einem metallischen Flachprodukt durch Pressumformen
EP2730346B1 (fr) Ligne moulée à chaud pour la fabrication de produits de tôle d'acier moulés à chaud et durcis à la presse
DE102014201259A1 (de) Wärmebehandlungsvorrichtung
DE102017109613B3 (de) Warmformlinie mit Temperierstation sowie Verfahren zum Betreiben
AT509596B1 (de) Verfahren zum erwärmen eines formbauteils für ein anschliessendes presshärten sowie durchlaufofen zum bereichsweisen erwärmen eines auf eine vorgegebene temperatur vorgewärmten formbauteils auf eine höhere temperatur
EP3108019B1 (fr) Procédé de chauffage par conduction de tôles par paire et dispositif de chauffage correspondant
EP3411163B1 (fr) Système de fabrication de pièces en acier trempées et procédé de trempe
EP2840153B1 (fr) Station de chauffage dotée de dispositif de chauffage à inducteur
EP2439289B1 (fr) Procédé et four destinés au traitement de pièces à usiner
EP3259377B1 (fr) Procédé de chauffage d'une tôle par conduction et dispositif de chauffage pour ledit procédé
DE102019121576A1 (de) Verfahren zur Herstellung eines pressgehärteten Blechbauteils und Beheizungsvorrichtung
DE102015121842B4 (de) Verfahren zum Betreiben einer Temperierstation
DE102014215676B4 (de) Verfahren zur Herstellung eines Bauteils, insbesondere einer Profilschiene
DE102010053980B4 (de) Etagenofen
EP3985133A2 (fr) Procédé de fabrication d'une platine d'acier, ainsi que station de thermorégulation
DE102015122390A1 (de) Verfahren zur konduktiven Erwärmung eines flächig ausgebildeten metallischen Bauteils
DE102020125946A1 (de) Verfahren zur Bearbeitung einer elektrisch leitfähigen Blechplatine
WO2023284905A1 (fr) Procédé de chauffage multizone, appareil de chauffage et procédé de production d'un composant de véhicule automobile

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

RIC1 Information provided on ipc code assigned before grant

Ipc: C21D 1/34 20060101AFI20150826BHEP

Ipc: C21D 1/673 20060101ALI20150826BHEP

Ipc: H05B 6/00 20060101ALI20150826BHEP

Ipc: C21D 9/00 20060101ALI20150826BHEP

Ipc: B21D 37/16 20060101ALI20150826BHEP

17P Request for examination filed

Effective date: 20160323

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: EXAMINATION IS IN PROGRESS

17Q First examination report despatched

Effective date: 20171113

RIC1 Information provided on ipc code assigned before grant

Ipc: C21D 9/46 20060101ALI20181219BHEP

Ipc: H05B 6/00 20060101ALI20181219BHEP

Ipc: B21D 37/16 20060101ALI20181219BHEP

Ipc: C21D 1/34 20060101AFI20181219BHEP

Ipc: C21D 1/673 20060101ALI20181219BHEP

Ipc: C21D 9/00 20060101ALI20181219BHEP

Ipc: B21D 22/02 20060101ALI20181219BHEP

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: GRANT OF PATENT IS INTENDED

INTG Intention to grant announced

Effective date: 20190125

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE PATENT HAS BEEN GRANTED

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 502015008762

Country of ref document: DE

REG Reference to a national code

Ref country code: AT

Ref legal event code: REF

Ref document number: 1124222

Country of ref document: AT

Kind code of ref document: T

Effective date: 20190515

Ref country code: IE

Ref legal event code: FG4D

Free format text: LANGUAGE OF EP DOCUMENT: GERMAN

REG Reference to a national code

Ref country code: NL

Ref legal event code: MP

Effective date: 20190424

REG Reference to a national code

Ref country code: LT

Ref legal event code: MG4D

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190424

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190424

Ref country code: HR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190424

Ref country code: AL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190424

Ref country code: NO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190724

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190424

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190824

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190424

Ref country code: LT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190424

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BG

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190724

Ref country code: RS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190424

Ref country code: LV

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190424

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190725

Ref country code: PL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190424

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190824

REG Reference to a national code

Ref country code: DE

Ref legal event code: R026

Ref document number: 502015008762

Country of ref document: DE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: RO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190424

Ref country code: CZ

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190424

Ref country code: SK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190424

Ref country code: EE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190424

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190424

PLBI Opposition filed

Free format text: ORIGINAL CODE: 0009260

PLAX Notice of opposition and request to file observation + time limit sent

Free format text: ORIGINAL CODE: EPIDOSNOBS2

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190424

Ref country code: SM

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190424

26 Opposition filed

Opponent name: AUTOTECH ENGINEERING S.L.

Effective date: 20200124

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: TR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190424

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190424

PLBB Reply of patent proprietor to notice(s) of opposition received

Free format text: ORIGINAL CODE: EPIDOSNOBS3

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20200206

REG Reference to a national code

Ref country code: BE

Ref legal event code: MM

Effective date: 20200229

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MC

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190424

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20200206

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20200229

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20200229

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20200206

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20200229

Ref country code: IE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20200206

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20200229

RIC2 Information provided on ipc code assigned after grant

Ipc: C21D 1/673 20060101ALI20210226BHEP

Ipc: B21D 22/02 20060101ALI20210226BHEP

Ipc: C21D 9/00 20060101ALI20210226BHEP

Ipc: B21D 22/20 20060101ALI20210226BHEP

Ipc: C21D 9/46 20060101ALI20210226BHEP

Ipc: B21D 37/16 20060101ALI20210226BHEP

Ipc: C21D 1/34 20060101AFI20210226BHEP

Ipc: H05B 6/00 20060101ALI20210226BHEP

REG Reference to a national code

Ref country code: AT

Ref legal event code: MM01

Ref document number: 1124222

Country of ref document: AT

Kind code of ref document: T

Effective date: 20200206

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20200206

PUAH Patent maintained in amended form

Free format text: ORIGINAL CODE: 0009272

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: PATENT MAINTAINED AS AMENDED

27A Patent maintained in amended form

Effective date: 20211110

AK Designated contracting states

Kind code of ref document: B2

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

REG Reference to a national code

Ref country code: DE

Ref legal event code: R102

Ref document number: 502015008762

Country of ref document: DE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190424

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190424

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190424

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20240227

Year of fee payment: 10